/dev/pn544 node is not creating for pn7150 in imx8mm

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/dev/pn544 node is not creating for pn7150 in imx8mm

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PramodKumar
Contributor IV

Dear Team ,

I have followed the https://www.nxp.com/docs/en/application-note/AN11697.pdf  document and did the changes in yocto project kernel 4.14 . Driver is compiled successfully , but the /dev/pn544 node is not creating . If any body implemented it in the same then please suggest me asap .

Regards ,

Pramod

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weidong_sun
NXP TechSupport
NXP TechSupport

Hi,PRAMOD,

It seems that PN54x driver is not correctly loaded into linux kernel. So check it according to the following steps, please!

1. Checking device tree

check if driver's name is the same as that of pn54x driver.

2. the probe function of pn54x driver.

Add debug messages in probe function, please!

--checking if probe function abnormally return.

--checking if it normally enter into probe function of pn54x driver.

--checking if pn54x device is normally registered.

Hope above information is helpful for you!

Have a nice day!

B.R,

Weidong

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